And this final note, a beef taco by any other name is a protein taco apparently.

Taco Bell's going to start testing a new "Protein Power" menu in Ohio starting in July. The idea is to double the meat in some of their menu items, limit the calories and emphasize the protein -- not the meat. Researchers have scoured the Internet for our feelings about terms like "meat" and "protein" and protein definitely wins the popularity contest.

Sarah Gardner is a reporter with Marketplace's Sustainability Desk. Her past projects include “We Used To Be China,” “Coal Play,” “Consumed,” “The Next American Dream,” “Jobs of the Future,” and “Climate Race,” among others. Sarah began her career at Marketplace as a...